Alloy 20 Wires – Manufacturer, Supplier & Exporter in Mumbai, India

Alloy 20 Wires – Manufacturer, Supplier & Exporter in Mumbai, India

Virami Steel Hub is a leading manufacturer, supplier, stockist, and exporter of premium-quality Alloy 20 Wires in Mumbai, India. We specialize in supplying high-performance nickel-iron-chromium alloy wires engineered for superior resistance to corrosion, particularly in sulfuric acid and other aggressive chemical environments.

Our Alloy 20 wires are manufactured using high-grade raw materials and advanced production techniques to ensure excellent mechanical strength, corrosion resistance, dimensional accuracy, and compliance with international standards. We supply across India and export globally to the USA, Europe, the Middle East, Africa, and Southeast Asia with assured quality and timely delivery.

What is Alloy 20?

Alloy 20, also known as UNS N08020 or Carpenter 20, is a nickel-iron-chromium alloy specifically designed to provide excellent resistance to sulfuric acid and other corrosive chemical environments. It contains controlled additions of copper and molybdenum, which enhance its resistance to pitting, crevice corrosion, and general corrosion.

Alloy 20 was originally developed for use in sulfuric acid-related industries, but its outstanding corrosion resistance and good mechanical properties have made it widely used in chemical processing, petrochemical, pharmaceutical, food processing, and marine industries.

Key Features of Alloy 20 Wires

Alloy 20 wires offer several performance advantages:

  • Exceptional resistance to sulfuric acid
  • Excellent resistance to pitting and crevice corrosion
  • Good resistance to stress corrosion cracking
  • Superior performance in chloride-containing environments
  • High mechanical strength and durability
  • Excellent fabricability and weldability
  • Stable performance at elevated temperatures
  • Good resistance to phosphoric and nitric acids

These properties make Alloy 20 wires suitable for highly corrosive industrial environments.


Chemical Composition of Alloy 20 (%)

Element Composition (%)
Nickel (Ni) 32 – 38
Chromium (Cr) 19 – 21
Iron (Fe) Balance
Molybdenum (Mo) 2 – 3
Copper (Cu) 3 – 4
Manganese (Mn) 2 max
Silicon (Si) ≤1
Carbon (C) 0.07 max
Niobium (Nb) Stabilized

Role of Key Alloying Elements

  • Nickel (Ni): Provides resistance to stress corrosion cracking and enhances toughness.
  • Chromium (Cr): Improves oxidation resistance and general corrosion resistance.
  • Molybdenum (Mo): Enhances resistance to pitting and crevice corrosion.
  • Copper (Cu): Improves resistance to sulfuric acid.
  • Niobium (Nb): Stabilizes the alloy to prevent intergranular corrosion.

This balanced composition ensures superior performance in highly corrosive environments.


Mechanical Properties

  • Tensile Strength: 550 – 800 MPa
  • Yield Strength: 240 – 380 MPa
  • Elongation: 30 – 40%
  • Hardness: 140 – 200 HB
  • Density: 8.08 g/cm³

These properties make Alloy 20 wires suitable for structural and chemical processing applications requiring strength and corrosion resistance.


Physical Properties

  • Melting Range: 1350 – 1400°C
  • Modulus of Elasticity: 195 GPa
  • Thermal Conductivity: 11.5 W/m·K
  • Electrical Resistivity: 0.98 µΩ·m
  • Coefficient of Thermal Expansion: 15 µm/m°C

These physical characteristics ensure dimensional stability and durability in industrial applications.


Corrosion Resistance

Alloy 20 wires are specifically designed to resist aggressive corrosive environments. They provide excellent resistance to:

  • Sulfuric acid (wide concentration range)
  • Phosphoric acid
  • Nitric acid
  • Organic acids
  • Chloride-containing environments
  • Pitting and crevice corrosion
  • Stress corrosion cracking

Due to this superior corrosion resistance, Alloy 20 is widely used in industries handling acidic chemicals and chloride-rich solutions.


Heat Treatment

Alloy 20 wires are typically supplied in solution annealed condition.

Solution Annealing:

  • Temperature Range: 925 – 1010°C
  • Rapid cooling (water quench)

This heat treatment ensures maximum corrosion resistance and optimal mechanical properties.


Weldability

Alloy 20 wires offer excellent weldability using standard welding techniques such as:

  • TIG (GTAW)
  • MIG (GMAW)
  • Shielded Metal Arc Welding

Welding considerations:

  • Use matching filler metals (ERNiCrMo-3 or Alloy 20 filler)
  • Clean surfaces before welding
  • Avoid contamination
  • Post-weld heat treatment generally not required

Proper welding maintains corrosion resistance and structural integrity.


Machinability

Alloy 20 has moderate machinability similar to other nickel-based alloys.

Recommended machining practices:

  • Use sharp carbide tools
  • Maintain moderate cutting speeds
  • Use adequate coolant
  • Avoid work hardening

Careful machining ensures dimensional precision and improved surface finish.


Standards & Specifications

Virami Steel Hub supplies Alloy 20 wires in compliance with international standards:

  • ASTM B473
  • ASTM B464
  • ASME SB473
  • UNS N08020

Available Sizes

  • Wire Diameter: 0.5 mm to 25 mm
  • Coil Weight: 1 kg to 500 kg
  • Straight lengths as required

Surface Finishes

  • Bright
  • Annealed
  • Polished
  • Cold Drawn

Custom sizes and finishes are available as per industrial requirements.


Applications of Alloy 20 Wires

Chemical Processing Industry

  • Sulfuric acid handling equipment
  • Chemical reactors
  • Heat exchangers
  • Storage tanks

Petrochemical Industry

  • Piping systems
  • Process equipment
  • Acid processing units

Pharmaceutical Industry

  • Corrosion-resistant components
  • Processing systems

Food Processing Industry

  • Acid-resistant processing equipment

Marine Applications

  • Components exposed to chloride-rich environments

Alloy 20 wires are ideal for industries requiring resistance to acid attack and corrosion.


Quality Testing & Inspection

At Virami Steel Hub, Alloy 20 wires undergo strict quality control procedures:

  • Chemical composition analysis
  • Mechanical and tensile testing
  • Hardness testing
  • Surface and dimensional inspection
  • Positive Material Identification (PMI)

Mill Test Certificates (MTC) are provided as per ASTM and ASME standards. Third-party inspection is available upon request.


Packaging & Delivery

We ensure safe packaging and reliable global delivery:

  • Moisture-proof packaging
  • Supplied in coils or straight lengths
  • Export-grade wooden boxes or pallets
  • Proper labeling and traceability

Our efficient logistics system ensures timely delivery worldwide.


Why Choose Virami Steel Hub?

  • Trusted manufacturer and exporter in Mumbai, India
  • Ready stock availability
  • Competitive pricing
  • Custom manufacturing options
  • International quality compliance
  • Strong global distribution network
  • Commitment to precision and customer satisfaction

Conclusion

Alloy 20 wires are high-performance nickel-based alloy wires specifically designed to provide exceptional resistance to sulfuric acid, chloride environments, and aggressive chemical conditions. With excellent mechanical strength, corrosion resistance, and fabrication properties, they are widely used in chemical processing, petrochemical, pharmaceutical, and industrial sectors.

Virami Steel Hub supplies certified Alloy 20 wires manufactured to meet global quality standards, ensuring long-term durability, reliability, and performance in demanding industrial environments.

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